判断用户输入的信息是否正确

package com.Embed.util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Common {

// 判断用户输入的时间格式是否正确
 public static boolean checkDateTime(String inputDate) {
  String DATE_TIME_FORMAT = "yyyy-MM-dd";
  java.text.SimpleDateFormat simpleDateFormat = new java.text.SimpleDateFormat(
    DATE_TIME_FORMAT);
  simpleDateFormat.setLenient(false);

  Date d = new Date();
  boolean check = false;
  try{
  d = simpleDateFormat.parse(inputDate);
  check = true;
  }catch(Exception ex){
   check = false;
   ex.printStackTrace();
  }
  
  return check;
 }
// 判断用户输入的是否是数字
 public static boolean checkNum(String inputValue) {
    return false;
 }
    

 public static String toUtf8String(String s) {
  StringBuffer sb = new StringBuffer();
  for (int i = 0; i < s.length(); i++) {
   char c = s.charAt(i);
   if (c >= 0 && c <= 255) {
    sb.append(c);
   } else {
    byte[] b;
    try {
     b = Character.toString(c).getBytes("utf-8");
    } catch (Exception ex) {
     System.out.println(ex);
     b = new byte[0];
    }
    for (int j = 0; j < b.length; j++) {
     int k = b[j];
     if (k < 0)
      k += 256;
     sb.append("%" + Integer.toHexString(k).toUpperCase());
    }
   }
  }
  return sb.toString();
 }

 public static Connection getConnection() {
  Connection conn = null;
  String Driver = "org.gjt.mm.mysql.Driver";
//  String Url = "jdbc:mysql://888888888:888/8888?useUnicode=true&characterEncoding=GBK";
//  String user = "8888";
//  String pwd = "8888";
  String Url = "jdbc:mysql://localhost:3306/8888?useUnicode=true&characterEncoding=GBK";
  String user = "root";
  String pwd = "000";
  try {
   Class.forName(Driver);
   conn = DriverManager.getConnection(Url, user, pwd);
  } catch (Exception e) {
   e.printStackTrace();
  }
  return conn;

 }

 // 返回系统时间..其他类可以直接调用此方法。
 public static String getDataTime() {
  String DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";
  java.text.SimpleDateFormat simpleDateFormat = new java.text.SimpleDateFormat(
    DATE_TIME_FORMAT);
  String time = simpleDateFormat.format(new java.util.Date(System
    .currentTimeMillis()));

  return time;
 }

 /**
  * 此方法判断输入字符是否为数字0-9 是返回true不是返回false
  *
  * @param c
  *            char
  * @return boolean
  */
 public static boolean isDigit(char c) {
  return (('0' <= c) && (c <= '9'));
 }

 /**
  * 此方法判断输入字符是否为数字a-z或A-Z 是返回true不是返回false
  *
  * @param c
  *            char
  * @return boolean
  */
 public static boolean isAlpha(char c) {
  return ((('a' <= c) && (c <= 'z')) || (('A' <= c) && (c <= 'Z')));
 }

 /**
  * 此方法用于检查密码是否合法，用户名密码只能使用英文字母、数字以及-和_，并且首字符必须为字母或数字 密码首字符必须为字母或数字
  *
  * @param passwordStr
  *            String
  * @return boolean
  */
 public static boolean checkUserNameAndPwssword(String passwordStr) {
  for (int nIndex = 0; nIndex < passwordStr.length(); nIndex++) {
   char cCheck = passwordStr.charAt(nIndex);
   if (nIndex == 0 && (cCheck == '-' || cCheck == '_')) {
    return false;
   }

   if (!(isDigit(cCheck) || isAlpha(cCheck) || cCheck == '-' || cCheck == '_')) {
    return false;
   }

  }
  return true;
 }

 /**
  * 此方法检查用户名是否包含非法字符 ！！！！！！！！！！！此方法暂时注释
  *
  * @param str
  *            String
  * @return boolean
  */
 // public static boolean checkUserName(String str)
 // {
 // for(int i=0;i // {
 // char c=str.charAt(i);
 // if(c=='\'' || c=='\"')
 // {
 // return false;
 // }
 // }
 // return true;
 // }
 /**
  * 此方法用于替换字符文本中的非法字符
  *
  * @param str
  *            String
  * @return String
  */
 public static String replaceStr(String str) {

  // CleanHtmlBr =
  // Replace(Replace(Replace(Replace(str,"<","<"),">",">"),,
  // "
"), chr(32)&chr(32),"  ")
  return str.replaceAll("<", "<").replaceAll(">", ">").replaceAll(
    "'", "‘").replaceAll("\"", "“");
 }

 /**
  * 此方法用于替换字符文本中"引号;
  *
  * @param str
  *            String
  * @return String
  */
 public static String replaceComma(String str) {

  // CleanHtmlBr =
  // Replace(Replace(Replace(Replace(str,"<","<"),">",">"),,
  // "
"), chr(32)&chr(32),"  ")
  return str.replaceAll("'", "‘").replaceAll("\"", "“");
 }

 /**
  * 此方法用于把字符“引号转换回普通引号";
  *
  * @param str
  *            String
  * @return String
  */
 public static String replaceReComma(String str) {

  // CleanHtmlBr =
  // Replace(Replace(Replace(Replace(str,"<","<"),">",">"),,
  // "
"), chr(32)&chr(32),"  ")
  return str.replaceAll("‘", "'").replaceAll("“", "\"");
 }

 /**
  * 此方法检查email有效性 返回提示信息 如果返回字符串ok则通过验证
  *
  * @param email
  *            String
  * @return String
  */
 public static String checkEmail(String email) {
  String checkEmail = email;
  String ok = "ok";
  // 检测输入的EMAIL地址是否以 非法符号"."或"@"作为起始字符
  Pattern p = Pattern.compile("^\\.|^\\@");
  Matcher m = p.matcher(checkEmail);
  if (m.find()) {
   ok = "EMAIL地址不能以'.'或作为起始字符";
   return ok;
  }
  // 检测是否以"www."为起始
  p = Pattern.compile("^www\\.");
  m = p.matcher(checkEmail);
  if (m.find()) {
   ok = "EMAIL地址不能以'www.'起始";
   return ok;
  }
  // 检测是否包含非法字符
  p = Pattern.compile("[^A-Za-z0-9\\.\\@_\\-~#]+");
  m = p.matcher(checkEmail);
  StringBuffer sb = new StringBuffer();
  boolean result = m.find();
  boolean deletedIllegalChars = false;
  while (result) {
   // 如果找到了非法字符那么就设下标记
   deletedIllegalChars = true;
   // 如果里面包含非法字符如冒号双引号等，那么就把他们消去，加到SB里面
   m.appendReplacement(sb, "");
   result = m.find();
  }
  m.appendTail(sb);
  checkEmail = sb.toString();
  if (deletedIllegalChars) {
   ok = "输入的EMAIL地址里包含有冒号、逗号等非法字符，请修改";

  }
  return ok;
 }

}